Corundum and Calcite Physical Properties
Solubility
insoluble
Soluble
Durability
Not Available
Not Available
Specific Gravity
3.90-4.05
2.67-2.73
Fracture
Uneven, Uneven, Gems, Difficult, Fibrous
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Cleavage
None – parting in 3 directions
Perfect on [10 1 1] three directions with angle of 74° 55
Chemical Composition
Al 2O 3Arthur Thomas , Gemstones (2009)
CaCO 3Ulrich Henn and Claudio C.
Corundum and Calcite Chemical Formula
While comparing Corundum and Calcite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Corundum and Calcite chemical formula.
- Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
- Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.
Corundum and Calcite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Corundum and Calcite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Calcite Optical Properties during the identification of gemstone. Specific gravity of Corundum is 2.67-2.73 whereas that of Calcite is 2.67-2.73.